Two days after an Egyptian immigrant family was found bound and stabbed to death in their Jersey City home, hundreds of mourners gathered at the family's church yesterday, many chanting for justice and decrying the killings as a crime of religious hatred. But the police would not discuss motives and said they were still searching for clues in the slayings of the family, Hossam Armanious, 46; his wife, Amal Garas, 36; and their daughters, Sylvia, 15, and Monica, 8, who were found on Friday with their throats slit in the family's two-story home. Mr. Armanious, who worked for the banquets...